Private AI Music Creator Webapp

I want a web-based “song laboratory” that stays 100 % private to me. Inside this secure space I must be able to: • Paste or type my own lyrics and let AI generate a full production—vocals, instrumentation and mix—around them... (Budget: $250 - $750 USD, Jobs: AI Audio-to-audio, AI Development, AI Integration, AI Music, Audio Engineering, iPhone, JavaScript, Mobile App Development, PHP, Web Application)